Pink Noise and the RDO 194 Tweeter

A little word of advise. Take it or leave it as intended. Stop defending every post and drop it and move on. Once you stop responding to off topic issues.........guess what, everyone else does too and then it dies.

Just walk away. It's better in some instances, because you aren't going to win and neither is anyone else who is part of this ongoing dialog. It will go on in perpetuity.

Just my last .02c

H9

ka7niq wrote: »

Pink noise, especially eq boosted, really forces the tweeter to move. I plan to let em burn in some more tomorrow.

To each his own. I prefer to use music at moderate to high levels to break in speakers or speaker components. For me, this has a few advantages:

1. The speaker components are broken in with signals typical of what they will be producing in actual music reproduction.

2. The use of music that I am very familiar with during the break in process allows me to more accurately detect any anomalies in the sound.

3. The use of music that I am very familiar with during the break in process allows me to more accurately gauge and document the changes (and hopefully improvements) in sound as the speaker or speaker component(s) break in.

ka7niq wrote: »

There really is not much UP beyond 2K, and it can take a tweeter a long time to break in.http://www.dak.com/reviews/Tutorial_frequencies.cfm

ka7niq wrote: »

Most musical fundamentals are much lower in frequency then you might think.

ka7niq wrote: »

Another Learning experience for you F1NUT, read and weep Amplitude of harmonics decreases inversely to the frequency of the harmonics, i.e. the 2nd harmonic of a sound is lower in amplitude than the fundamental, yet higher in amplitude than successive harmonics.

For a pure fundamental tone produced by a signal generator, the harmonics of the fundamental frequency will decrease in amplitude as the harmonic frequencies increase. However, this decreasing harmonic amplitude does not apply to music signals. If it did, all musical instruments would sound very similar to each other. Musical instruments create complex acoustic waveforms that are heavy with harmonic distortion. In the case of instruments that produce "buzzy" type sounds (e.g. saxophones, electric guitars, etc.), the amplitude of certain higher harmonics may be close to, or exceed, the amplitude of the fundamental frequency. I am attaching a copy of an article from a respected scholarly publication, the Journal of Neurobiology, [Volume 59, Issue 3 (June 2004), pages 319-330] which states (pg. 320, col. 2, par. 2):

"Male zebra finches sing stereotyped motifs of typically three to seven distinct syllables. Many syllables are characterized by low fundamental frequency and complex harmonic content, where upper harmonics often exceed the fundamental frequency in relative amplitude."

The chart that shows the frequency ranges of fundamental and harmonic tones produced by musical instruments (here) neglects to mention that, for musical instruments (and also for human and animal voices), the amplitude of the harmonic content is quite significant.

If you do a Google search on "musical acoustics" or "harmonic content of music", you will find many references for further reading. Some of these references will include spectrograms of sound produced by various musical instruments. These spectrograms show the relative amplitudes of the fundamental tones and harmonics produced by an instrument.